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RHB-CAC1S-Series
Compressed Air Dew Point Monitor
- NIST Traceable
- +/- 0.2 deg C
- Virtually Maintenance Free
- Easy to Install
RHB-CAC1S-Series
From
Product Overview
- Alarm Audible: >98 dB @ 2' ; Relay: 1 form “C”, non-latching; 10 A @ 240 Vac, 8 A @ 24 Vdc, 1 ⁄2 hp @ 240 Vac ; Visual: Flashing “ALARM” message
- Dew/Frost Point Accuracy 0.2°C (± 0.5°F)
- Dew/Frost Point Temperature Max 50 °C
- Display Type LED
- Electrical Output 4 to 20 mA
- Enclosure Aluminium
- Enclosure Ratings IP55, NEMA Type 12
- Measurement Type Dew Point
- Mounting Space-Saving Wall Mount
- Operating Temperature, Max 50 °C
- Operating Temperature, Min 0 °C
- Output Detail 4 to 20 mA (0 to 5 Vdc), -50 to 50°C (-58 to 122°F) or -60 to 75°C (-76 to 167°F)
- Process Connection Size 1/4 in
- Process Connection Type Compression Fitting
- Process Temperature, Max 50 °C
- Sample Flow Rate 0.5 to 5.0 scfh, Integral flow meter
- Sample Pressure 0 to 150 psig (higher pressures available, consult Engineering Department)
- Series ID RHB-CAC1S-Series
- Supply Voltage 90 to 250 Vac
- Temperature Accuracy ± 0.2 °C
- Temperature Accuracy Note ± 0.2 °C (± 0.5 °F)
Supported Applications
The Omega RHB-CAC1 Series is a chilled mirror based hygrometer designed to monitor the dew point in compressed air systems. The integrated system includes a microprocessor-based instrument, a chilled mirror dew point sensor, a sample flow meter and valve, and associated tubing and fittings.
Operating Conditions & Performance
The series measures dew point across a range of -80 to +40 °C (-112 to +104 °F) with an accuracy of ±0.5 °C (±0.9 °F). Repeatability is specified as ±0.2 °C, and the resolution is 0.1 °C. The response time for the sensor is 10 minutes.
Maximum inlet pressure is rated at 150 PSIG. Wetted materials in contact with the process media include copper, stainless steel, and plastic. Power requirements are met by a supply of 90 to 260 VAC.
Key Performance Specifications
- Measurement Type: Dew Point (Chilled Mirror)
- Range: -80 to +40 °C (-112 to +104 °F)
- Accuracy: ±0.5 °C, ±0.9 °F
- Repeatability: ±0.2 °C
- Resolution: 0.1 °C
- Response Time: 10 minutes
- Maximum Pressure: 150 PSIG
Configuration Options
The RHB-CAC1 Series is housed in a wall mount enclosure designed for mounting to any vertical surface. The overall dimensions are 14" height, 10.68" width, and 6" depth.
The instrument features an eight-digit alphanumeric LED display. It includes programmable alarm set points with visual, audible, and contact closure indications via an SPDT (Form C) alarm relay. A periodic sensor balance check is included in the system functions.
Outputs and Connectivity
- Analog Output: 4 to 20 mA
- Digital Communication: RS-232 Serial (Optional)
- Serial Connector Assignment: P11-1 for LO(-) and P11-2 for HI(+)
- Process Connection: 1/4" female fitting
- Electrical Connection: Pigtail leads and wire nuts (Black, White, Green wires)
Housing and Mounting
The enclosure is designed for wall mounting. Installation requires removing three thumbscrews to access the internal wiring box where power line wires are connected via wire nuts.
Key Product Differences
Variants within the RHB-CAC1S-Series differ primarily by output configuration and optional accessories, as indicated by model suffixes. The base series supports a 4 to 20 mA analog output standard across configurations.
- RS-232 Serial: Available as an option on specific variants (e.g., models with "RHB-ATP" in the part number).
- Housing/Model Codes: Variants include RHB-CAC1S2 and RHB-CAC1S3 configurations, distinguishing between standard analog output only or combined analog/digital capabilities.
PDFs & Manuals
